Historic Heat in North America Turns Winter to Summer
A huge, lingering ridge of high pressure over the eastern half of the United States brought summer-like temperatures to North America in March 2012. The warm weather shattered records across the central and eastern United States and much of Canada.
The unseasonable warmth broke temperature records in more than 1,054 locations between March 13–19, as well daily lows in 627 locations, according to Hamweather. Cities as geographically diverse as Chicago, Des Moines, Traverse City (Michigan), Myrtle Beach, Madison (Wisconsin), Atlantic City, New York City, and Duluth, (Minnesota) all broke records for high temperatures in recent days.